1 /* $NetBSD: mail.c,v 1.18 2017/06/04 20:28:13 kre Exp $ */ 2 3 /*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Kenneth Almquist. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)mail.c 8.2 (Berkeley) 5/4/95"; 39 #else 40 __RCSID("$NetBSD: mail.c,v 1.18 2017/06/04 20:28:13 kre Exp $"); 41 #endif 42 #endif /* not lint */ 43 44 /* 45 * Routines to check for mail. (Perhaps make part of main.c?) 46 */ 47 #include <sys/types.h> 48 #include <sys/stat.h> 49 #include <stdlib.h> 50 #include <string.h> 51 52 #include "shell.h" 53 #include "exec.h" /* defines padvance() */ 54 #include "var.h" 55 #include "output.h" 56 #include "memalloc.h" 57 #include "error.h" 58 #include "mail.h" 59 60 61 #define MAXMBOXES 10 62 63 64 STATIC int nmboxes; /* number of mailboxes */ 65 STATIC off_t mailsize[MAXMBOXES]; /* sizes of mailboxes */ 66 67 68 69 /* 70 * Print appropriate message(s) if mail has arrived. If the argument is 71 * nozero, then the value of MAIL has changed, so we just update the 72 * values. 73 */ 74 75 void 76 chkmail(int silent) 77 { 78 int i; 79 const char *mpath; 80 char *p; 81 char *q; 82 struct stackmark smark; 83 struct stat statb; 84 85 if (silent) 86 nmboxes = 10; 87 if (nmboxes == 0) 88 return; 89 setstackmark(&smark); 90 mpath = mpathset() ? mpathval() : mailval(); 91 for (i = 0 ; i < nmboxes ; i++) { 92 p = padvance(&mpath, nullstr, 1); 93 if (p == NULL) 94 break; 95 stunalloc(p); 96 if (*p == '\0') 97 continue; 98 for (q = p ; *q ; q++) 99 ; 100 if (q[-1] != '/') 101 abort(); 102 q[-1] = '\0'; /* delete trailing '/' */ 103 #ifdef notdef /* this is what the System V shell claims to do (it lies) */ 104 if (stat(p, &statb) < 0) 105 statb.st_mtime = 0; 106 if (statb.st_mtime > mailtime[i] && ! silent) { 107 out2str(pathopt ? pathopt : "you have mail"); 108 out2c('\n'); 109 } 110 mailtime[i] = statb.st_mtime; 111 #else /* this is what it should do */ 112 if (stat(p, &statb) < 0) 113 statb.st_size = 0; 114 if (statb.st_size > mailsize[i] && ! silent) { 115 const char *pp; 116 117 if ((pp = pathopt) != NULL) { 118 int len = 0; 119 120 while (*pp && *pp != ':') 121 len++, pp++; 122 if (len == 0) { 123 CHECKSTRSPACE(16, p); 124 strcat(p, ": file changed"); 125 } else { 126 while (stackblocksize() <= len) 127 growstackblock(); 128 p = stackblock(); 129 memcpy(p, pathopt, len); 130 p[len] = '\0'; 131 } 132 pp = p; 133 } else 134 pp = "you have mail"; 135 136 out2str(pp); 137 out2c('\n'); 138 } 139 mailsize[i] = statb.st_size; 140 #endif 141 } 142 nmboxes = i; 143 popstackmark(&smark); 144 } 145